Viscosity at 15 degrees C = 1.114x10^-3
What direction should I be going in here? Do I need to use the velocity equation to solve for U and then find the force with a different equation?
Thanks for any help.

Since the area is 1 m^2 the net force of the plate on the fluid is 22.28 [N] in the negative x-direction

I hope this was of any help. I am pretty sure you have to use the velocity gradient at the bottom location. I am tired so I may have made a mistake but the principle should be pretty clear